20525440

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{2467}}^1$

素因数の和:2499

約数の個数: 64

約数和(自身を含む): 52864560

約数和(自身を除く): 32339120

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 260, 320, 416, 520, 640, 832, 1040, 1664, 2080, 2467, 4160, 4934, 8320, 9868, 12335, 19736, 24670, 32071, 39472, 49340, 64142, 78944, 98680, 128284, 157888, 160355, 197360, 256568, 315776, 320710, 394720, 513136, 641420, 789440, 1026272, 1282840, 1578880, 2052544, 2565680, 4105088, 5131360, 10262720, 20525440]

約数ペア:

[(1, 20525440), (2, 10262720), (4, 5131360), (5, 4105088), (8, 2565680), (10, 2052544), (13, 1578880), (16, 1282840), (20, 1026272), (26, 789440), (32, 641420), (40, 513136), (52, 394720), (64, 320710), (65, 315776), (80, 256568), (104, 197360), (128, 160355), (130, 157888), (160, 128284), (208, 98680), (260, 78944), (320, 64142), (416, 49340), (520, 39472), (640, 32071), (832, 24670), (1040, 19736), (1664, 12335), (2080, 9868), (2467, 8320), (4160, 4934)]